Question

he doesn’t think i can sing in english 改为反意疑问句，加上关于反意疑问句的深度讲解

Answer 1

反义疑问句。它表示提问人的看法,没有把握,需要对方证实。它表示提问人的看法，没有把握，需要对方证实。反义疑问句由两部分组成：前一部分是一个陈述句，后一部分是一个简短的疑问句，两部分的人称时态应保持一致。
1．陈述部分肯定式+疑问部分否定式 2．陈述部分否定式+疑问部分肯定式
They work here, don’t they?
She was ill yesterday, wasn’t she?
You didn’t go, did you?
He can’t ride a bike, can he?

请注意以下句型的反义疑问句的用法：

当陈述部分的主语是I，后面的疑问句应表示为：
I am a student, aren’t I

当陈述部分的主语是I，而句子又用来征询对方的意见时，附加疑问句中的主语用you。如：
I find English very interesting, don’t you?
I don’t like that film, do you?

当陈述部分的主语是everybody, everyone, someone, somebody, anybody, anyone, nobody, no one,等合成代词时，附加疑问句中的主语通常用they
Everyone is in the classroom, aren’t they?

当陈述部分的主语是不定代词everything, nothing, anything, something时，附加疑问句中的主语一般用it，不用they。如：
Everything seems all right now, doesn’t it?
Nothing is kept in good order, is it?
Something must be done to stop pollution, isn’t it?

当陈述部分的主语是指示代词this, that或these, those时，附加疑问句中的主语分别用it和they。如：
This is important, isn’t it?
That isn’t correct, is it?
These are your friends Tom and Jack, aren’t they?

陈述部分是以代词one作主语，附加疑问句中的主语在正式场合用one，非正式场合用you,在美国英语中，在非正式场合还可以用he。如：
One can’t be too careful, can one?或can you?
One should do his duty, shouldn’t he?

陈述句为there be结构时，附加疑问句中的主语也用there。如：
There’s no help for it, is there?
There’s something wrong, isn’t there?

陈述部分的谓语是wish，疑问部分要用may +主语。

I wish to have a word with you, may I?

当陈述部分是I think, believe, expect, suppose, imagine等引导宾语从句时，疑问句应和从句的人称时态保持一致。
I think chickens can swim, can’t they?
I believe Lucy is a good girl, isn’t she?
I didn't suppose he was happy, was he?

当陈述部分有never，seldom, hardly，few，little，barely, scarcely, nothing 等否定词时，后面的疑问句则表示为：
There are few apples in the basket, are there?
He can hardly swim, can he?
They seldom come late, do they?

陈述部分的否定词带有否定前缀，那么，该陈述部分作肯定处理，附加疑问部分一般仍用否定形式。如：
He was unsuccessful, wasn’t he?
Tom dislikes the book, doesn’t he?

陈述部分有had better 时，疑问句应用hadn’t开头：

you’d better get up early, hadn’t you?

当陈述部分是祈使句时，疑问句要根据语气来表达

Let’s go out for a walk, shall we?

Let us go our for a walk, will you?

Turn on the radio, will/won’t you?

Don't do that again, will you?
在感叹句中，疑问部分用be +主语。 What colours, aren't they? What a smell, isn't it?
反义疑问句的回答用yes， no， 但是，当陈述部分是否定形式时，回答要按事实。如：
They don’t work hard, do they? 他们不太努力工作，是吗？

Yes, they do. 不，他们工作努力。/No, they don’t. 对， 他们工作不努力。

Answer 2

He doesn't think I can sing in English, does he?
反意疑问句的一般规律就是主句是肯定句时，反问用否定；主句是否定句时，反问用肯定。这句的主句是否定，反问就用否定。

一般情况下，主句用什么类型的助动词，反问就用什么类型的助动词。如这句的主句用了 "do”作为助动词，反问时，也用"do"。

如果主句用了 "be"(是动词），反问也要用"be"：
You are a student of this school, aren't you?

其它类推：
They can't finish the work by this evening, can they?
She hasn't been to Beijing, has she?.....

Answer 3

He doesn't think I can sing in English, does he?
结构：（陈述句）+（be/情态动词/助动词+主语）
前肯（定），后否（定）：前否，后肯。